For a 3 Tn unit- single phase- 220 V a.c and for a 5 TN unit 3 phase - 220 V a.c ,wich is the ampacity of each one, wich is the recomended gage of the feeders for each one?
There should be a full load amps or rated load amps on each of these units on the rating or nameplate. The ampacity or fuse size and wire size, which I think that's what you are wanting to know . The fuse size would be full or rated load amps times 125% and the wire size depending on the length of the run, 50 feet or less, (15 amps 14 gauge wire), (20 amps 12 gauge), (30 amps 10 gauge), and (40 amps 8 gauge).
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What do you mean by "feeders"?
??? you have to be in a commercial building to have 3 phase
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